Peter May wrote in a message to Thom Kouwenhoven:

 TK> On 16 Oct 03 04:06 you wrote something about *VEHICLE LED'S*... 

 TK>> I've had an Ensoniq Mirage and it worked on 3.5" 720k floppy's

 RJT> So did the optional external floppy drive that came with the Yamaha
 RJT> CX5 computer.  I got one box of those,  don't think I used more than
 RJT> one or two of them.

 TK> I have the experience that the 720k floppy's are a bit more
 TK> reliable than the 1.44MB type.

 PM> I've got a Mark I emulator sythesiser that needs a single sided
 PM> full height floppy drive.

A 5.25"?

 PM> Almost impossible to come by now, with the mirage theres a work
 PM> around solution available to put a 1.44MB in but with the emulator
 PM> you are chasing up old shugarts etc. I threw box loads of them away
 PM> years ago

I try not to throw much of anything away if I can help it,  if it's
anything that might be useful in some context at some time.

 PM> I wish I knew more about floppies, there must be some way to modify
 PM> a double sided to work properly. 

The sidedness isn't an issue,  SS drives had one head and a felt pad,  DS
drives had two heads and one of them was in a slightly different mounting. 
That's not a problem in most cases as the head select line is not used with
the SS drives and the unused state (?) seems to get you the right side.

 PM> Theres also the question of that offset hole near the middle and 
 PM> formatting etc.

Not sure what you're referring to here particularly the first part.

Formatting could be a problem,  though,  if you're trying to put a HD drive
in where a DD was before.  The number of tracks is wrong,  and if you
double-step it then you still have a narrower track which could be a bit of
a problem if there were data on the floppy written by the older drives.

---